Strange semi-hangs on 5.4

[Kris Kennaway]

On Sun, May 08, 2005 at 04:14:45PM -0700, Doug White wrote:
> On Sun, 8 May 2005, [ISO-8859-1] Eirik Øverby wrote:
> 
> > Hi all,
> >
> > With relatively recent 5.4, I'm seeing hangs that worry me. The box
> > (dual opteron) accepts keyboard input, but it won't actually DO
> > anything.. SSHing in gives me a TCP session but no actualy password
> > prompt. Trying to log in on (serial) console doesn't work, I just get
> > a newline after entering the username, no password prompt. On SSH
> > shells alredy open, I can't even get a new prompt line, all I get is
> > newlines.
> 
> I've seen this if you have console redirection set to "always" on certain
> BIOSes. Some apparently can stay alive after FreeBSD steals the serial
> port and jumps into protected mode. Most notice loader fiddling with the
> port registers and know to get out of the way.
> 
> Try turning it off or setting it to "Boot Loader" or turn off "CR
> Redirection after POST".
> 
> > telnet> send brk
> 
> Cyclades?
> 
> > KDB: enter: Line break on console
> > 3KtDhB:a s tpaicdk  1b1a0e00:0
> 
> Ah, interleaved output :-)
> 
> > aitd l e _ p r o c ( )   a t   i d l e _ p r o c + 0 x 1 1 3
> 
> The spaces here are what I'm guessing is the console redirection.

Or two simultaneous panics from different CPUs..I get this quite
frequently (but not the DDB prompt loop).

Kris


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